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Challenging Science Puzzles

I am deciding to make a new thread of science problems, which require word problems. In order to answer these questions, you need to write a link which contain these answers, just so everyone can have a go at answering these questions. In the end, whoever has answered the mot questions correctly wins. I shall be writing a problem everyday, starting from tomorrow, 25th December.

Here is an example problem:

LED Lights

A light-emitting diode (LED) is a small solid state device that gives off light when a current passes through it. It is commonly used in clocks to give off a clear red, or sometimes green, digital display.

There is a type of LED in the market that glows red when current flows through it one way, and green when the current flows the other way. An alternating current flows rapidly one way and then the other. What would this LED look like if it were connected to an alternating source?

Note by Sharky Kesa
3 years, 1 month ago

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It seems a bit confusing for us to write it in a different link... How do we submit it? Where do we write it? If only there was a "hide" BBCode... Daniel Liu · 3 years, 1 month ago

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@Daniel Liu Write it on social media, or make an HTML document. Sharky Kesa · 3 years, 1 month ago

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Due to persistence of vision we would see the red and green lights simultaneously; thereby interpreting it as yellow light. picture Yash Talekar · 3 years, 1 month ago

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@Yash Talekar Yep, although could you actually post it on a different link so other people won't read. It gives everyone a go. Sharky Kesa · 3 years, 1 month ago

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@Sharky Kesa How do I do this? Yash Talekar · 3 years, 1 month ago

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@Yash Talekar Hey Yash, the long-term solution to this is for Brilliant to allow the creation of problems that allow open-ended solutions, where you don't get to see others' solutions until you have written your own.

In the meanwhile, I suggest that if you have the answer, you create a Note on Brilliant with your solution, and then link to the note from the comments. We'll be making this better soon, but I hope this provides a workaround so that people can enjoy Sharky's posts until then!

That said, I don't necessarily think it's bad to discuss the solution in the comments, so my hope would be that the rules for these science puzzles can become more flexible. Notes are predominantly meant to be a medium where users talk about different approaches and ideas, not end a conversation by posting the "right" answer. Suyeon Khim Staff · 3 years, 1 month ago

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@Yash Talekar Maybe create a HTML document if it works. If it doesn't post it on some social media. Sharky Kesa · 3 years, 1 month ago

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